Theo Engines
Every Theo engine powering the product, grouped by what it does — and, under each one, the lab model Theo orchestrates for it. Theo is the orchestrator: it routes each step of a request to the best engine for the job and switches automatically when one is slow or unavailable. This page is generated directly from the model catalog — when a new engine is added, it appears here automatically.
Conversational Engines
Theo engines that power conversations, reasoning, and long-form responses.
Theo Fast
Theo →Gemini 3.7 Flash· Google
Fast, 1M-context reasoning — quick answers, agents and long documents.
Available since Aug 2026
Theo Creative
Theo →Gemini 3 Pro Image· Google
All-rounder — creative, artistic images.
Available since May 2026
Theo Atlas
Theo →GLM 5.1· Zhipu AI
Open-weight contributor on the consensus panel.
Available since Oct 2025
Theo Balanced
Theo →Claude Sonnet 4.6· Anthropic
Current mid-tier Anthropic engine (4.x line). Retired from the chat fallback chains 2026-07 in favor of Sonnet 5 / Gemini Flash (3.7 since 2026-09); still backs Code Canvas tiers + the presentation planner fallback. Supports adaptive thinking via `providerOptions.anthropic.thinking: { type: "adaptive" }`.
Available since Feb 2026
Theo Code
newTheo →Claude Opus 4.7· Anthropic
Frontier coding with high-effort reasoning.
Available since Apr 2026
Theo Explore
Theo →GPT-5.6 Sol· OpenAI
Broad exploration and tool-assisted reasoning.
Available since Jul 2026
Theo Fast
Theo →Claude Haiku 4.5· Anthropic
Primary engine for Theo Fast mode; low-latency lightweight responses.
Available since Oct 2025
Theo Insight
Theo →Gemini 3.1 Pro· Google
Large-context synthesis on the consensus panel.
Available since Dec 2025
Theo Stealth
Theo →Venice Uncensored· Venice
Zero-retention primary for private mode text. Venice serves the bare `venice-uncensored` id from its current 1.2 release and tags that release `most_uncensored`; the wire id is kept as-is because it resolves correctly and is stable across their point releases.
Available since Oct 2025
Theo Swift
Theo →Gemini 3.1 Flash-Lite· Google
Cross-provider fallback for Theo Fast + the routing-brain classifier fallback (2026-07). Replaces gemini-2.5-flash.
Available since May 2026
Theo Think
newTheo →Claude Sonnet 5· Anthropic
Deep reasoning and long-form analysis.
Available since Jun 2026
Theo Think
Theo →Claude Opus 4.6· Anthropic
Legacy frontier engine — replaced across chat modes 2026-07 by Sonnet 5 (think/creative) and Opus 4.8 (research/care/consensus). Kept addressable for billing drain + env overrides.
Available since Nov 2025
Theo Velocity
Theo →Grok 4.3· xAI
High-velocity contributor on the consensus panel.
Available since Nov 2025
Theo Voice
Theo →Gemini 3.1 Flash Live· Google
Voice mode uses the Live API directly (VOICE_MODEL_ID in src/types/voice.ts); this entry carries the cost/metadata only.
Available since Mar 2026
Image Engines
Theo engines that generate images from prompts or reference material.
Theo Creative
Theo →Gemini 3 Pro Image· Google
All-rounder — creative, artistic images.
Available since May 2026
Theo Photo
Theo →FLUX 1.1 Pro Ultra· Black Forest Labs
Photorealistic — lifelike images & portraits.
Available since Jun 2025
Theo Rapid
Theo →FLUX Schnell· Black Forest Labs
Fastest — quick drafts and concepts.
Available since Jun 2025
Theo Design
Theo →Recraft V3· Recraft
Logos, icons & vector art.
Available since Jun 2025
Theo Studio
Theo →Seedream 4· ByteDance
High detail — cinematic & editorial quality.
Available since Oct 2025
Theo Type
Theo →Ideogram 3· Ideogram
Perfect text rendering in images.
Available since Jun 2025
Theo Imagine
newTheo →GPT Image· OpenAI
Next-gen image engine with crisp text rendering.
Available since Apr 2026
Theo Turbo
Theo →Z-Image Turbo· Alibaba
Lightning-fast generation.
Available since Sep 2025
Theo Core
Theo →Stable Diffusion 3.5· Stability AI
Versatile all-rounder.
Available since Aug 2025
Theo Ink
Theo →Qwen Image· Alibaba
Illustrated & painterly styles.
Available since Aug 2025
Theo Chroma
Theo →Chroma· Open-source
Vibrant high-fidelity.
Available since Aug 2025
Theo Unbound
Theo →Lustify 8· Venice
Fully uncensored, realistic.
Available since Aug 2025
Theo Unbound Classic
Theo →Lustify 7· Venice
Fully uncensored — the previous Unbound look.
Available since Jan 2025
Theo Raw
Theo →Lustify SDXL· Venice
Uncensored SDXL.
Available since Aug 2025
Theo Anime
Theo →WAI Illustrious· Venice
Uncensored anime & illustration.
Available since Aug 2025
Theo Dream
Theo →Seedream 4· ByteDance
Cinematic & editorial.
Available since Oct 2025
Theo Dream Lite
Theo →Seedream 5 Lite· ByteDance
Fast cinematic.
Available since Dec 2025
Image Editing
Theo engines for targeted edits, style transfer, and retouching.
Theo Creative
Theo →Gemini 3 Pro Image· Google
All-rounder — creative, artistic images.
Available since May 2026
Theo Studio
Theo →Seedream 4· ByteDance
High detail — cinematic & editorial quality.
Available since Oct 2025
Theo Expand
Theo →Bria Expand· Bria
True outpaint — original pixels preserved on a larger canvas, margins generated. Used by the Image Canvas honest 'extend' objective and the chat resize router.
Available since Sep 2025
Theo Retouch
Theo →FLUX Kontext Pro· Black Forest Labs
Targeted edits, style transfer, scene transforms.
Available since Jul 2025
Video Engines
Theo engines that generate motion from text or image prompts.
Theo Motion Ultra
betaTheo →MiniMax H3· MiniMax
Fully uncensored, with audio.
Available since Aug 2026
Theo Motion Cinema
newTheo →HappyHorse 1.1· Venice
Cinematic, with audio — content filtered.
Available since Aug 2026
Theo Motion
Theo →Wan 2.5· Alibaba
Text-to-video generation.
Available since Oct 2025
Theo Motion Uncensored
Theo →Wan 2.2· Alibaba
Uncensored text-to-video.
Available since Aug 2025
Hailuo 02
Theo →Hailuo 02· MiniMax
Best for human characters + micro-expressions. $0.045/sec at 768P.
Available since Sep 2025
LTX-2
Theo →LTX-2· Lightricks
Open-weight 4K + cheapest premium tier ($0.06/sec at 1080p).
Available since Jan 2026
Seedance 2.0
Theo →Seedance 2.0· ByteDance
Multi-shot stories + director-level @ mentions. Arena #2 ranked. Also Director Mode's premium 'Cinema' tier (tier-labeled there — the SceneNode brand-name exception does NOT extend to that surface).
Available since Feb 2026
Sora 2
Theo →Sora 2· OpenAI
Best physics + longest clips (up to 20s). Native audio.
Available since Feb 2026
Theo Cinema
Theo →Kling 2.6 Pro· Kuaishou
Cinematic / animation scenes.
Available since Sep 2025
Theo Cinema Lite
Theo →Kling 2.6 Standard· Kuaishou
Social-short fallback.
Available since Sep 2025
Theo Reel
Theo →Veo 3.1· Google
Explainer / tutorial video engine. Always-available default for storyboard scenes.
Available since Oct 2025
Theo Tempo
Theo →Seedance 1.5 Pro· ByteDance
DEPRECATED — superseded by Seedance 2.0 in the 2026-05 SceneNode roster. Kept for back-compat with persisted scene jobs.
Available since Sep 2025
Consensus Panel
Theo engines that contribute to the Consensus panel for cross-validated answers.
Theo Atlas
Theo →GLM 5.1· Zhipu AI
Open-weight contributor on the consensus panel.
Available since Oct 2025
Theo Insight
Theo →Gemini 3.1 Pro· Google
Large-context synthesis on the consensus panel.
Available since Dec 2025
Theo Velocity
Theo →Grok 4.3· xAI
High-velocity contributor on the consensus panel.
Available since Nov 2025
Presenter Engines
Theo engines that render avatar-led presenter scenes for videos and storyboards.
Theo Anchor
Theo →HeyGen Avatar IV· HeyGen
Presenter avatar for storyboard scenes.
Available since Jun 2025
Theo Host
Theo →HeyGen Video Agent· HeyGen
One-shot presenter bookend for commercial / documentary styles.
Available since Jun 2025
Choose Your Engines
Theo decides which engine runs each job by default, and you can have a say. During onboarding (and any time in Settings → Theo Engines) you pick an engine policy: Let Theo orchestrate (recommended — the routing on this page), Economy (quick answers run on the cheapest open-weight engine to stretch your credits), or One engine for everything (pick a single lab engine and every chat runs on it first).
Your pick never removes Theo’s safety net: the usual engines stay on standby behind your engine, Image and Consensus keep Theo’s own routing, and a turn your engine can’t serve (a photo on an engine that can’t see images, a Code build on an engine without a large context) falls through to Theo’s usual engine — the orchestration trace always shows what actually ran, labelled “your engine” when it was your pick.
When New Engines Arrive
Whenever a research lab ships a new frontier model, OpenCharts onboards it through the unified model catalog. A new engine lands as a single catalog entry with its capabilities, Theo-branded display name, and rollout gate — and then automatically shows up here, in the engine selectors, and in the consensus panel.
Every engine keeps a stable Theo identity (e.g. Theo Photo, Theo Explore) even when the lab model behind it is upgraded — and Theo always shows its work. Each card here names the lab model behind the tier, and in chat the orchestration trace shows which engine handled each step of your request (“Theo → model”), with an info button explaining what Theo was doing.
Related Articles
AI Chat
Conversational AI that creates flowcharts, whiteboards, notes, and presentations from natural language.
Consensus Mode
Query 7 AI models simultaneously, see agreement levels, and get a synthesized consensus answer.
Theo AI Overview
Overview of Theo AI — 11 chat modes, creation tools, generative UI, memory, and the sidebar mascot.
Explore Mode
Conversational exploration with proactive web search, inline citations, reasoning, and knowledge maps.